source: nappy/trunk/naFile1020.py @ 347

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/nappy/trunk/naFile1020.py@347
Revision 347, 1.9 KB checked in by selatham, 15 years ago (diff)

Incorporates changes by selatham and Ag Stephens. as of 5/11/04.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
Line 
1"""
2naFile1020.py
3=============
4
5Container module for NAFile1020 class.
6
7"""
8
9# Imports from python standard library
10
11# Imports from local package
12from textParser import *
13import naFile1010
14
15class NAFile1020(naFile1010.NAFile1010):
16    """
17    Class to read, write and interact with NASA Ames files conforming to the
18    File Format Index (FFI) 1020.
19    """
20
21    def readHeader(self):
22        """
23        Reads FFI-specifc header section.
24        """   
25        self._normalizedX="no"
26        self._readCommonHeader()
27        self.DX=readItemsFromLine(self.file.readline(), self.NIV, float)
28        if self.DX==0:
29            raise "DX found to be zero (0). Not allowed for FFI 1020."
30
31        self.NVPM=readItemFromLine(self.file.readline(), int)
32        self.XNAME=readItemsFromLines(self._readLines(self.NIV), self.NIV, str)
33        self._readVariablesHeaderSection()
34        self._readAuxVariablesHeaderSection()
35        self._readComments()
36 
37    def _readData2(self, datalines, ivar_count):
38        """
39        Reads second line/section (if used) of current block of data.
40        """       
41        # Now get the dependent variables
42        (v, rtlines)=readItemsFromUnknownLines(datalines, self.NV*self.NVPM, float)             
43        count=0
44        for n in range(self.NV):
45            self.V[n].append([])
46            for i in range(self.NVPM):   # Number of steps where independent variable is implied
47                self.V[n][ivar_count].append(v[count])
48            count=count+1
49        return rtlines
50
51    def _normalizeIndVars(self):
52        """
53        Normalizes the values in the unbounded independent variable for FFIs
54        that store an abbreviated version of this axis.
55        """
56        newX=[]
57        for x in self.X[0]:
58            for i in range(self.NVPM):
59                newX.append(x+(i*self.DX))
60        self.X[0]=newX
61        self._normalizedX="yes"
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